Site work and new construction of a civil project in Columbus, Ohio. Completed plans call for the construction of a bridge / tunnel; and for site work for a water / sewer project.

As of Dec 1 the project will be out for rebid between Dec 9 to Dec 23 2020. The City of Columbus is accepting bids for Lower Olentangy Tunnel, CIP 650724-100000. The project consists of the construction of approximately 17,000 linear feet of 12-foot minimum diameter sewer via tunnel boring machine through soft-ground, mixed-face conditions and a short section of shale. The project also includes 335 linear feet of 12-foot diameter sewer via sequential excavation through karstic limestone, and approximately 1,075 linear feet of 90-inch combined sewer to be constructed via curved microtunnel through soft-ground. Construction also includes five (5) shafts, three (3) diversion structures, four (4) relief structures, and three (3) jack and bores. The project will include ancillary utility, odor control, instrumentation, electrical work, maintenance and operating instructions; training; start-up; testing; commissioning; and other such work as may be necessary to complete the contract as shown on the detailed drawings and as specified in the contract specifications. Questions pertaining to the drawings and specifications must be submitted in writing only to DLZ Corporation, ATTN: Jeff Murphy, via email at jmurphy@dlz.com at least fourteen (14) days prior to the date fixed for the opening. Any questions regarding the bidding process may be sent electronically to DPUConstructionBids@columbus.gov, copying All work shall be substantially complete by June 30, 2026, with final completion to occur by December 31, 2026. The City anticipates issuing a Notice to Proceed on or about May 3, 2021.